Have you used database migrations in your projects and how?

In Python projects for managing database migrations, tools like Alembic (for SQLAlchemy) or Django migrations (if the project is on Django) are often used. Migrations allow you to sequentially change the database structure — add tables, columns, indexes, etc., while preserving the history of changes.

Example with Alembic:

1. Create a migration with the command alembic revision --autogenerate -m "Add email field to users".
2. Review and, if necessary, correct the generated migration script.
3. Apply the migration with the command alembic upgrade head.

This way, you can safely update the database structure without data loss and with the ability to roll back.